Preparation of layered potassium titanate whiskers with large length-diameter ratio by KDC method

Abstract

Pure K₂Ti₄O₉ whiskers were prepared by KDC (Kneading-Drying-Calcination) method with TiO₂ and K₂CO₃ as raw materials. The influences of TiO₂/K₂CO₃ molar ratio (R _T/K), calcination temperature (T _C) and cooling process on phase composition and morphology of the whiskers were investigated by TG-DSC (thermo gravimetric-differential scanning calorimeter), XRD (X-ray diffraction), and SEM (scanning electron microscope). Pure K₂Ti₄O₉ potassium titanate whiskers with large length-diameter ratio (r) (over 250) can be obtained at R _T/K = 2.9 and T _C = 950 °C.

Keywords

KDC (kneading-drying-calcination) method / potassium titanate / whiskers / TiO₂/K₂CO₃ molar ratio (R _T/K) / length-diameter ratio (r)

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